Material Drying
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PBT Low-VOC Automotive Parts
Problem Phenomenon
Automotive interior PBT parts fail the odor grade, and VOC testing exceeds the standard
Cause Analysis
Automotive low-VOC modified PBT requires controlling small-molecule precipitation: full formulation control from resin, glass fiber, toughening agent, antioxidant, lubricant to hydrolysis-resistant agent; SSP solid-state polycondensation removes small molecules
Solution
①Select dedicated low-VOC grades for automotive interiors; ②Verify odor grade according to standards such as Q/BYDQ; ③Prefer SSP process grades; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Low VOC is the new threshold for PBT automotive interiors; full-formulation small-molecule control plus the SSP process is the technical route; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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